//package com.cyn.aframework.http;
//
//import org.apache.http.HttpEntityEnclosingRequest;
//import org.apache.http.HttpHost;
//import org.apache.http.HttpRequest;
//import org.apache.http.client.HttpRequestRetryHandler;
//import org.apache.http.client.config.RequestConfig;
//import org.apache.http.client.methods.HttpRequestBase;
//import org.apache.http.client.protocol.HttpClientContext;
//import org.apache.http.config.Registry;
//import org.apache.http.config.RegistryBuilder;
//import org.apache.http.conn.routing.HttpRoute;
//import org.apache.http.conn.socket.ConnectionSocketFactory;
//import org.apache.http.conn.socket.LayeredConnectionSocketFactory;
//import org.apache.http.conn.socket.PlainConnectionSocketFactory;
//import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
//import org.apache.http.impl.client.CloseableHttpClient;
//import org.apache.http.impl.client.HttpClients;
//import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
//
//import java.util.TimerTask;
//import java.util.concurrent.Executors;
//import java.util.concurrent.ScheduledExecutorService;
//
//public class HttpConnectionPoolUtil {
//
////    private static Logger logger = LoggerFactory.getLogger(HttpConnectionPoolUtil.class);
//
//    private static final int CONNECT_TIMEOUT = Config.getHttpConnectTimeout();// 设置连接建立的超时时间为10s
//    private static final int SOCKET_TIMEOUT = Config.getHttpSocketTimeout();
//    private static final int MAX_CONN = Config.getHttpMaxPoolSize(); // 最大连接数
//    private static final int Max_PRE_ROUTE = Config.getHttpMaxPoolSize();
//    private static final int MAX_ROUTE = Config.getHttpMaxPoolSize();
//    private static CloseableHttpClient httpClient; // 发送请求的客户端单例
//    private static PoolingHttpClientConnectionManager manager; //连接池管理类
//    private static ScheduledExecutorService monitorExecutor;
//
//    private final static Object syncLock = new Object(); // 相当于线程锁,用于线程安全
//
//    /**
//     * 对http请求进行基本设置
//     * @param httpRequestBase http请求
//     */
//    private static void setRequestConfig(HttpRequestBase httpRequestBase){
//        RequestConfig requestConfig = RequestConfig.custom().setConnectionRequestTimeout(CONNECT_TIMEOUT)
//                .setConnectTimeout(CONNECT_TIMEOUT)
//                .setSocketTimeout(SOCKET_TIMEOUT).build();
//
//        httpRequestBase.setConfig(requestConfig);
//    }
//
//    public static CloseableHttpClient getHttpClient(String url){
//        String hostName = url.split("/")[2];
//        System.out.println(hostName);
//        int port = 80;
//        if (hostName.contains(":")){
//            String[] args = hostName.split(":");
//            hostName = args[0];
//            port = Integer.parseInt(args[1]);
//        }
//
//        if (httpClient == null){
//            //多线程下多个线程同时调用getHttpClient容易导致重复创建httpClient对象的问题,所以加上了同步锁
//            synchronized (syncLock){
//                if (httpClient == null){
//                    httpClient = createHttpClient(hostName, port);
//                    //开启监控线程,对异常和空闲线程进行关闭
//                    monitorExecutor = Executors.newScheduledThreadPool(1);
//                    monitorExecutor.scheduleAtFixedRate(new TimerTask() {
//                        @Override
//                        public void run() {
//                            //关闭异常连接
//                            manager.closeExpiredConnections();
//                            //关闭5s空闲的连接
//                            manager.closeIdleConnections(Config.getHttpIdelTimeout(), TimeUnit.MILLISECONDS);
//                            logger.info("close expired and idle for over 5s connection");
//                        }
//                    }, Config.getHttpMonitorInterval(), Config.getHttpMonitorInterval(), TimeUnit.MILLISECONDS);
//                }
//            }
//        }
//        return httpClient;
//    }
//
//    /**
//     * 根据host和port构建httpclient实例
//     * @param host 要访问的域名
//     * @param port 要访问的端口
//     * @return
//     */
//    public static CloseableHttpClient createHttpClient(String host, int port){
//        ConnectionSocketFactory plainSocketFactory = PlainConnectionSocketFactory.getSocketFactory();
//        LayeredConnectionSocketFactory sslSocketFactory = SSLConnectionSocketFactory.getSocketFactory();
//        Registry<ConnectionSocketFactory> registry = RegistryBuilder.<ConnectionSocketFactory> create().register("http", plainSocketFactory)
//                .register("https", sslSocketFactory).build();
//
//        manager = new PoolingHttpClientConnectionManager(registry);
//        //设置连接参数
//        manager.setMaxTotal(MAX_CONN); // 最大连接数
//        manager.setDefaultMaxPerRoute(Max_PRE_ROUTE); // 路由最大连接数
//
//        HttpHost httpHost = new HttpHost(host, port);
//        manager.setMaxPerRoute(new HttpRoute(httpHost), MAX_ROUTE);
//
//        //请求失败时,进行请求重试
//        HttpRequestRetryHandler handler = new HttpRequestRetryHandler() {
//            @Override
//            public boolean retryRequest(IOException e, int i, HttpContext httpContext) {
//                if (i > 3){
//                    //重试超过3次,放弃请求
//                    logger.error("retry has more than 3 time, give up request");
//                    return false;
//                }
//                if (e instanceof NoHttpResponseException){
//                    //服务器没有响应,可能是服务器断开了连接,应该重试
//                    logger.error("receive no response from server, retry");
//                    return true;
//                }
//                if (e instanceof SSLHandshakeException){
//                    // SSL握手异常
//                    logger.error("SSL hand shake exception");
//                    return false;
//                }
//                if (e instanceof InterruptedIOException){
//                    //超时
//                    logger.error("InterruptedIOException");
//                    return false;
//                }
//                if (e instanceof UnknownHostException){
//                    // 服务器不可达
//                    logger.error("server host unknown");
//                    return false;
//                }
//                if (e instanceof ConnectTimeoutException){
//                    // 连接超时
//                    logger.error("Connection Time out");
//                    return false;
//                }
//                if (e instanceof SSLException){
//                    logger.error("SSLException");
//                    return false;
//                }
//
//                HttpClientContext context = HttpClientContext.adapt(httpContext);
//                HttpRequest request = context.getRequest();
//                if (!(request instanceof HttpEntityEnclosingRequest)){
//                    //如果请求不是关闭连接的请求
//                    return true;
//                }
//                return false;
//            }
//        };
//
//        CloseableHttpClient client = HttpClients.custom().setConnectionManager(manager).setRetryHandler(handler).build();
//        return client;
//    }
//
//    /**
//     * 设置post请求的参数
//     * @param httpPost
//     * @param params
//     */
//    private static void setPostParams(HttpPost httpPost, Map<String, String> params){
//        List<NameValuePair> nvps = new ArrayList<NameValuePair>();
//        Set<String> keys = params.keySet();
//        for (String key: keys){
//            nvps.add(new BasicNameValuePair(key, params.get(key)));
//        }
//        try {
//            httpPost.setEntity(new UrlEncodedFormEntity(nvps, "utf-8"));
//        } catch (UnsupportedEncodingException e) {
//            e.printStackTrace();
//        }
//    }
//
//    public static JsonObject post(String url, Map<String, String> params){
//        HttpPost httpPost = new HttpPost(url);
//        setRequestConfig(httpPost);
//        setPostParams(httpPost, params);
//        CloseableHttpResponse response = null;
//        InputStream in = null;
//        JsonObject object = null;
//        try {
//            response = getHttpClient(url).execute(httpPost, HttpClientContext.create());
//            HttpEntity entity = response.getEntity();
//            if (entity != null) {
//                in = entity.getContent();
//                String result = IOUtils.toString(in, "utf-8");
//                Gson gson = new Gson();
//                object = gson.fromJson(result, JsonObject.class);
//            }
//        } catch (IOException e) {
//            e.printStackTrace();
//        } finally {
//            try{
//                if (in != null) in.close();
//                if (response != null) response.close();
//            } catch (IOException e) {
//                e.printStackTrace();
//            }
//        }
//        return object;
//    }
//
//    /**
//     * 关闭连接池
//     */
//    public static void closeConnectionPool(){
//        try {
//            httpClient.close();
//            manager.close();
//            monitorExecutor.shutdown();
//        } catch (IOException e) {
//            e.printStackTrace();
//        }
//    }
//}